The present invention relates to an oral composition and an oral plaque dispersion agent, both of which, when applied in the oral cavity, enable the effective dispersion of plaques that are firmly adhered onto the surfaces of teeth. An oral composition comprising the components (A), (B) and (C) mentioned below, wherein the content of the component (A) is 3 to 50% by mass inclusive relative to the total content of the components (A) and (B): (A) an olefin sulfonic acid salt having 14 to 20 carbon atoms inclusive； (B) a hydroxyalkanesulfonic acid salt having 14 to 20 carbon atoms inclusive； and (C) sorbitol.本發明係關於一種藉由應用於口腔內，可有效地使牢固地附著於齒面之齒垢分散之口腔用組合物及口腔內齒垢分散劑。 本發明之口腔用組合物含有如下成分(A)、(B)及(C)： (A)碳數14以上且20以下之烯烴磺酸鹽、 (B)碳數14以上且20以下之羥基烷磺酸鹽、及 (C)山梨糖醇，且 成分(A)之含量於成分(A)與成分(B)之合計含量中為3質量%以上且50質量%以下。
